At the time of the constitution convention. The constitution gave congress the authority to veto state laws

False

Explanation:

During the Constitutional Convention, several ideas were thrown around for what the Constitution should look like including the Virginia plan. The Virginia plan called for several things in the Constitution today such as the Bicameral legislature that the U.S. currently has.

It also however, called for Congress to be able to veto state laws. This was rejected by the Convention as most delegates believed that states should be able to be independent of the Federal government.

a. the astrolabe could determine the correct latitudinal location of the ship

b toward the volcano.landward. the landward side of something is the side nearest to the land or facing the land, rather than the sea.